I use Nicehash (Europe version) and have never had a problem. I just set up a worker just for Nicehash with a min diff of 128 to get the ball rolling. It currently at 33334 diff at 30TH. Runs 24/7. Should be jumping to 50TH soon. Are you using the bot?
Ah, that was the problem -- Westhash is for pools on this (U.S.) side of the pond :-) I switched to nicehash.com and slush seems to be working much better!
No bot, yet. I'm still in training ... :-)
Thanks!
-dave
Download the bot. It's a game changer. If you want any help just send me a PM.